8
relay transfers if the local alarm default signal is
activated by an initiating control board (CZM-4 or
ALD-2I). This occurs when the initiating board
cannot communicate with the MXL. Likewise, if any
local module, including the PSR-1, loses communi-
cation with the MXL, the trouble relay transfers.
When the system is operating normally, these relays
are controlled by output logic only. See Figure 6 for
ratings and wiring instruction.
Auxiliary Power for CZM-1 and PS-5A (TB3)
A Class A power limited output is provided on TB3,
terminals 3-6 for use with the CZM-1 and PS-5A.
1. This power is available on TB3, terminals 3
through 6.
2. All wiring must be in accordance with Article
760 of NEC or local building codes.
3. The power for CZM-1 and PS-5A is power
limited to NFPA 70 per NEC 760.
4. Electrical Ratings:
18-31 VDC, unfiltered full wave
2A max
5. You may connect a maximum of 40 CZM-1s
to the TB3 power source. Follow the guide-
lines below when wiring.
a. This power may be wired Class A, as
shown in Figure 7. Class A wiring can
support a maximum of 20 CZM-1s, with
total line resistance of 4 ohms max.
T-tapping is not allowed.
b. Refer to Figure 8. Class B wiring can be
used
to obtain the maximum of 40 CZM-1s.
Each
Class B wire run can support a maximum of
Figure 6
Common Alarm and Common Trouble Relays
Figure 7
CZM-1 Power, Class A Wiring
6
5
4
3
2
1
TB1
COMMON
TROUBLE
RATINGS
2A, 30 VDC
RESISTIVE
COMMON
ALARM
REFER TO WIRING SPECIFICATION FOR MXL, MXL-IQ
AND MXLV SYSTEMS, P/N 315-092772 REVISION 6 OR
HIGHER, FOR FURTHER INFORMATION.
6
5
4
2
3
1
+
+
_
_
TB3
CZM-1
NO
T-TAPPING ALLOWED
CLASS A WIRING
REFER TO WIRING SPECIFICATION FOR MXL, MXL-IQ
AND MXLV SYSTEMS, P/N 315-092772 REVISION 6 OR
HIGHER, FOR FURTHER INFORMATION.
18-31 VDC
2A MAX
POWER LIMITED TO
NFPA 70 PER NEC 760
4 OHMS MAX (TOTAL)
18 AWG MIN
POSITIVE AND NEGATIVE
GROUND FAULT DETECTED
AT <30K OHMS FOR TB3, 1-6
RES EOL ASSEMBLY
120 OHMS, 1/4W, 5%
P/N 140-049099
MMB-3
4
3
2
1
CHASSIS
NO
EOLR
TB1
TB1
TB4
4
3
2
1
PSR-1
MOI-7
PSR-1
TB4
4
3
2
1
4 3 2 1
RES EOL ASSEMBLY
120 OHMS, 1/4W, 5%
P/N 140-049099
NO
EOLR
SHIELD
N
E
T
-
7
RES EOL ASSEMBLY
120 OHMS, 1/4W, 5%
P/N 140-049099
NET-7
OR
NET-7M
Figure 5
Connecting a Style 7 Network to MMB-3
REFER TO WIRING SPECIFICATION FOR MXL, MXL-IQ AND MXLV
SYSTEMS, P/N 315-092772 REVISION 6 OR HIGHER, FOR
ADDITIONAL WIRING INFORMATION.
SET "MMB-3 MNET STYLE 7" TO "YES" IN THE CSGM.
